P008A on Mercedes-Benz: How to Diagnose & Fix
Low Pressure Fuel System Pressure - Too Low
1 Mercedes-Benz model · 1 documented issue · 1 critical
P008A on Mercedes-Benz by model: symptoms, diagnosis and fix
Recall 23V445 directly covers 43,257 model-year 2021-2023 GLC 300 vehicles with fuel-pump impellers that may not meet material specifications. An affected impeller may deform, contact the pump housing and create mechanical resistance; in some instances the fuel pump can shut down and the vehicle can lose propulsion, increasing crash risk. A warning message or rough running may occur before shutdown. The 43,257-vehicle population is not an owner-report count.
Common Symptoms
- VIN checked for recall 23V445
- warning message and rough running documented
- loss-of-propulsion risk treated as safety-critical
How to Fix
Check the VIN for recall 23V445 and have an authorized Mercedes-Benz dealer replace the fuel-delivery module when eligible. Do not buy a fuel pump or delivery module from this page; recall eligibility and the correct module are VIN-specific.
Sources for this issue (1)
P008A code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P008A mean on a Mercedes-Benz?
P008A stands for "Low Pressure Fuel System Pressure - Too Low." Generic OBD-II code, most often seen on direct-injection and diesel vehicles that use both a low-pressure lift pump and a high-pressure pump. The PCM compares the commanded low-side fuel pressure to what the low-pressure fuel sensor reports and sets this code when actual pressure (or fuel volume/flow) falls below the expected value. Because the high-pressure pump is starved, the engine can run lean, misfire, hesitate under load, crank a long time, stall, or go into reduced-power mode. This one should not be ignored - sustained low supply pressure can damage the high-pressure pump. Note that some manufacturers define this code slightly differently. On Mercedes-Benz it is documented across 1 model: GLC.
What are the most common causes of P008A?
The most common causes of P008A are: Weak or failing in-tank fuel pump / lift pump, Clogged fuel filter or restricted fuel line, Faulty low-pressure fuel or fuel rail pressure sensor giving a false low reading, Leaking fuel line, injector, or pressure regulator on the low-pressure side, Low fuel level or contaminated/wrong fuel, Fuel pump control module or wiring/relay fault. The specific cause varies by vehicle.
How much does it cost to fix P008A on a Mercedes-Benz?
Repair costs vary widely with the root cause and Mercedes-Benz model; each issue on this page carries its own estimate where one is published.
Looking for P008A on a different make?
View P008A across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.